If the cabinets are in good shape, they are probably worth a re build. They are a 15 inch 3 way from the 1980's from a rack system. Tweeters are a 3 inch cone, mid is a 5 1/4 inch cone.... cheap electrolytics in the crossover. I wouldn't mess with a repair period. If the boxes look good, I'd probably salvage the woofers, replace the mid & tweeter and customize a simple crossover. You could get very satisfying results.